SQLite and argparse for Tiny Apps is an important beginner topic in real Python work.
This lesson keeps the language simple but professional. You will learn what the concept is, why it matters, and how to apply it safely in small projects.
Detailed explanation of SQLite and argparse for Tiny Apps:
1. Understand the smallest version first.
2. Practice with short examples.
3. Observe outputs and errors carefully.
4. Refactor names so code reads like plain English.
5. Repeat with small daily exercises.
Example 1
GET request with requests
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import requests
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r = requests.get('https://httpbin.org/get', timeout=10)
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print(r.status_code)
Run this example, then change one input and observe what changes.
Example 2
Read JSON response
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import requests
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r = requests.get('https://httpbin.org/json', timeout=10)
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print(r.json().keys())
Run this example, then change one input and observe what changes.
Example 3
POST request basics
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import requests
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r = requests.post('https://httpbin.org/post', json={'x':1}, timeout=10)
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print(r.status_code)
Run this example, then change one input and observe what changes.
Example 4
Handle request errors
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import requests
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try:
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requests.get('https://example.invalid', timeout=2)
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except requests.RequestException:
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print('request failed')
Run this example, then change one input and observe what changes.
Example 5
sqlite3 connect
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import sqlite3
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conn = sqlite3.connect('app.db')
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print('connected')
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conn.close()
Run this example, then change one input and observe what changes.
Example 6
sqlite3 create table
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import sqlite3
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conn = sqlite3.connect('app.db')
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conn.execute('CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, name TEXT)')
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conn.commit()
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conn.close()
Run this example, then change one input and observe what changes.
Example 7
sqlite3 insert row
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import sqlite3
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conn = sqlite3.connect('app.db')
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conn.execute('INSERT INTO users(name) VALUES (?)', ('Ama',))
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conn.commit()
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conn.close()
Run this example, then change one input and observe what changes.
Example 8
sqlite3 query rows
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import sqlite3
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conn = sqlite3.connect('app.db')
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rows = conn.execute('SELECT id, name FROM users').fetchall()
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print(rows)
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conn.close()
Run this example, then change one input and observe what changes.
Example 9
argparse basic cli
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import argparse
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p = argparse.ArgumentParser()
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p.add_argument('--name', default='Learner')
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args = p.parse_args()
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print(args.name)
Run this example, then change one input and observe what changes.
Example 10
argparse with int option
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import argparse
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p = argparse.ArgumentParser()
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p.add_argument('--count', type=int, default=1)
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args = p.parse_args()
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print(args.count * 2)
Run this example, then change one input and observe what changes.